I first mistakenly put these into the Plugins folder, in which I got the message
"Error: Found "GetPluginSettings" function, but is not global. This feature will not be available in the editor."
However, when I put these into the behaviors folder, I got the same error message and these will not work in the editor.
I am sorry if I made a mistake in where I put the folders (I put the folders 8DirMP and PlatMP into the Behaviors sub-folder).
I am sorry, but it turns out I WAS at fault here :p
I had a jumble of things in the wrong folder- behaviors in plugins, plugins in behaviors - blahh...
Everything is working fine.